Compact microfiber bragg gratings with high-index contrast

Yanxin Liu, Chao Meng, Aping Zhang, Yao Xiao, Huakang Yu, Limin Tong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

107 Citations (Scopus)


We fabricate fiber Bragg grating (FBG) in microfibers (MFs) using focused ion beam milling technique. By periodically etching 100nm-depth grooves on the surface of silica MFs with diameters less than 2 μm, evident grating features with transmission dip up to 15 dB are obtained. Because of the high-index contrast of the gratings structure, the length of the microfiber Bragg grating (MFBG) can be reduced to 500 μm level. Using a 518 μm-length 1:8 μmdiameter MFBG, we also demonstrate sensitivity up to 660nm per refractive index unit (RIU) for refractive index (RI) sensing. The highly compact MFBGs demonstrated here may serve as low-dimensional building blocks for miniaturized photonic components and devices.
Original languageEnglish
Pages (from-to)3115-3117
Number of pages3
JournalOptics Letters
Issue number16
Publication statusPublished - 15 Aug 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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